Amashi Niwarthana

PhD Candidate · Computer Science · NTU Singapore

I work at the intersection of signal processing and machine learning, with a focus on healthcare and neuroscience — from decoding brain-gene interactions in Alzheimer's disease to robust biosignal estimation from wearable sensors. Previously a visiting researcher at the University of Sydney and an undergraduate researcher at Harvard University.

Experience

PhD Researcher Jan 2024 —
Nanyang Technological University, Singapore
Computer Science. Partnerships Lead, TEDxNTU (Jul 2024 —).
Visiting Researcher Feb 2022 — Jan 2024
University of Sydney, Australia
Undergraduate Student Researcher Jul 2022 — Jul 2023
Harvard University · Remote
Visiting Instructor Oct 2022 — Jan 2023
University of Moratuwa, Sri Lanka
Founder Jan 2021 —
Thinksage Foundation
Non-profit working toward holistic improvement of living conditions for children in need in Sri Lanka.

Publications

Decoding Brain Structure and Gene Expression Interactions in Alzheimer's Disease Pathology
Amashi Niwarthana, Chockalingam Kasi, Yi Hao Chan, Conghao Wang, Jagath C Rajapakse
ICASSP 2025 · IEEE International Conference on Acoustics, Speech and Signal Processing
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Efficient and Robust Heart Rate Estimation Approach for Noisy Wearable PPG Sensors Using Ideal Representation Learning
Amashi Niwarthana, Pamuditha Somarathne, Pierre Qian, Ken-Tye Yong, Anusha Withana
ACM · 2024
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Appropriate Incongruity Driven Human-AI Collaborative Tool to Assist Novices in Humorous Content Generation
H. Kariyawasam, A. Niwarthana, A. Palmer, J. Kay, A. Withana
ACM International Conference Proceeding Series · 2024
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Lost in Translation: The Critical Role of Attention in Adaptive Image Reconstruction
L. T. N. Wickremasinghe, D. S. P. A. Niwarthana, P. M. P. H. Somarathne, A. Thieshanthan, Brandon Weissbourd, C. U. S. Edussooriya, Dushan N. Wadduwage
Optica Imaging Congress (COSI) · 2023
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MOSAIC: Masked Optimisation with Selective Attention for Image Reconstruction
P. Somarathne, T. Wickremasinghe, A. Niwarthana, A. Thieshanthan, C. U. S. Edussooriya, D. N. Wadduwage
arXiv · 2023
HPGNN: Using Hierarchical Graph Neural Networks for Outdoor Point Cloud Processing
A. Thieshanthan, A. Niwarthana, P. Somarathne, T. Wickremasinghe, R. Rodrigo
ICPR 2022 · International Conference on Pattern Recognition
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